So I have a 9V CO monitor in my build, but the issue is that it's always doing the 90-second chirp indicating low battery. It's a new battery, which I bench tested at 9+ volts, but I've realized the problem is that when it's cold (Colorado high country), the battery isn't performing at its peak, so the detector thinks the battery is dying!
Any tips for getting around this?
Posted Dec 30, 2019, 2:23 AM UTC
What temperature is the battery being exposed to?
Maybe -5F at the lowest. I have been noticing this at around 15-25F.
I suspect you need to pose this question to the CO Detector support people. Let them know your operating temperature.
CO sensors need to be calibrated for altitude
How does one do that?
It's a basic FirstAlert.
I’m not sure on that one. I probably spoke out of turn. It might just be a battery/low temp thing like you said. Maybe they sell a high altitude version. It doesn’t look like they give any procedure in their manual.
We have to calibrate our industrial sensors for seemingly benign environmental changes to keep them happy.
You could hardwire it to your house batteries via some sort of 12v to 9v power supply.
That's clever...
It could also be a warning beep that the temperature is outside the detector's operational limits.
If anyone is curious, I ending up picking up a 12V dual CO/LP monitor that I will be wiring into my aux battery
You could try single-use lithium batteries such as this.